Message Board for PC version

Is it possible to kill people without being chased by others? I was up in my Tenpenny suite and saw Irving Cheng go into his room. I followed him in sneak mode and wasn't seen at all. I closed the door and shot him in the head with a silenced pistol. I went out and the guard started shooting at me. What gives? There's no way he could have known I did that.

One of the things I liked about the Elder Scrolls games is that it was possible to goad someone into attacking you, then it's self defense and the faction doesn't become hostile and the guards don't want your butt.